<template>
  <div>
    <!--  面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!--    卡片视图区域-->
    <el-card>
      <!--警告区域-->
      <el-alert
        :closable="false"
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
        show-icon
      >
      </el-alert>
      <!--      选择商品分类区域-->
      <el-row class="box">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择-->
          <el-cascader
            expand-trigger="hover"
            v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <!--      Tab页签区域-->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <!--        添加动态参数的面板-->
        <el-tab-pane label="动态参数" name="many">
          <!--  添加参数按钮-->
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数
          </el-button>
          <!--动态参数表格-->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行-->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签-->
                <el-tag closable
                        @close="handleClose(index,scope.row)"
                        v-for="(item,index) in scope.row.attr_vals"
                        :key="index"
                >{{ item }}
                </el-tag>
                <!--    输入的文本框-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮-->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <!--  索引列-->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">

              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">
                  编辑
                </el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row)">删除
                </el-button>
              </template>

            </el-table-column>
          </el-table>

        </el-tab-pane>
        <!-- 添加静态属性的面板-->
        <el-tab-pane label="静态属性" name="only">
          <!--  添加属性按钮-->
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性
          </el-button>
          <el-table :data="onlyTabData" border stripe>
            <!-- 展开行-->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签-->
                <el-tag closable
                        @close="handleClose(index,scope.row)"
                        v-for="(item,index) in scope.row.attr_vals"
                        :key="index"
                >{{ item }}
                </el-tag>
                <!--    输入的文本框-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮-->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <!--  索引列-->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row)">编辑
                </el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row)">删除
                </el-button>
              </template>

            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!--    添加参数的对话框-->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
    </el-dialog>
    <!--      修改参数的对话框-->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
    </el-dialog>
    <!--    -->
  </div>
</template>

<script>
import {
  addParams,
  editParams,
  getCatePramas,
  handleChange, handleInputConfirm,
  removeParams,
  showEditDialog
} from '@/api/cate'

export default {
  name: 'Params',
  data () {
    return {
      cateList: [],
      // 级联选择框配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //  级联选择框双向绑定到的数组
      selectedCateKeys: [],
      // 被激活的页签名称
      activeName: 'many',
      //  动态参数数据
      manyTableData: [],
      //  静态属性数据
      onlyTabData: [],
      // 控制添加对话框的显示与影藏
      addDialogVisible: false,
      // 添加参数的表单的数据对象
      addForm: {
        attr_name: ''
      },
      // 添加参数的表单验证规则
      addFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称',
            trigger: 'blur'
          }
        ]
      },
      //  控制对话框的修改与隐藏
      editDialogVisible: false,
      //  修改的表单数据对象
      editForm: {},
      /// / 修改参数的表单验证规则
      editFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created () {
    this.getCateParams()
  },
  methods: {
    // 删除对应的参数和选项
    handleClose (index, row) {
      row.attr_vals.splice(index, 1)
      this.saveAttrVals(row)
    },
    // 文本框失去焦点或摁下enter都会触发
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      //  如果没有return，则证明后续输入的内容需要做处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    // 将对attr_vals的操作，保存到数据库
    async saveAttrVals (row) {
      // 需要发送请求，保存这次操作
      const res = await handleInputConfirm(row)
      console.log(res)
      if (res.data.meta.status !== 200) {
        this.$message.error('修改参数项失败')
      }
      this.$message.success('修改参数项成功')
    },
    // 点击按钮,展示文本输入框
    showInput (row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 根据Id删除对应的参数项
    async removeParams (row) {
      console.log(row)
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const res = await removeParams(row)
      console.log(res)
      if (res.data.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    // 点击按钮修改参数信息
    editParams () {
      console.log('editform', this.editForm)
      this.$refs.editFormRef.validate(async valid => {
        // eslint-disable-next-line no-useless-return
        if (!valid) return
        const res = await editParams(this.editForm)
        // console.log(res)

        if (res.data.meta.status !== 200) {
          this.$message.error('更新失败')
        }
        this.$message.success('更新成功')
        this.getParamsData()
        this.addDialogVisible = false
      })
    },
    // 重置修改的表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    async getCateParams () {
      const res = await getCatePramas()
      // console.log(res)
      if (res.data.meta.status !== 200) {
        this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data.data
    },
    // 级联选择框选中项变化，会触发这个函数
    handleChange () {
      this.getParamsData()
    },
    // 获取参数的列表数据
    async getParamsData () {
      // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTabData = []
        return
      }
      // 证明选中的不是三级分类
      console.log(this.selectedCateKeys)
      const res = await handleChange(this.cateId, { sel: this.activeName })
      // console.log(res)
      if (res.data.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }

      res.data.data.forEach(item => {
        // console.log('item', item)
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与影藏
        item.inputVisible = false
        // 文本框输入的值
        item.inputValue = ''
      })

      console.log(res.data.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data.data
      } else {
        this.onlyTabData = res.data.data
      }
    },
    //  tab页签点击事件的处理函数
    handleClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 监听添加对话框关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    async addParams () {
      this.$refs.addFormRef.validate(valid => {
        // eslint-disable-next-line no-useless-return
        if (!valid) return
      })
      const res = await addParams(this.cateId, this.addForm.attr_name, this.activeName)
      // console.log(res)
      console.log(this.cateId)
      if (res.data.meta.status !== 201) {
        this.$message.error('添加参数失败')
      }
      this.$message.success('添加参数成功')
      this.addDialogVisible = false
      this.getParamsData()
    },
    // 点击按钮，展示修改的对话框
    async showEditDialog (attrId) {
      console.log(attrId)
      const res = await showEditDialog(this.cateId, attrId, this.activeName)
      console.log(res)
      if (res.data.meta.status !== 200) {
        this.$message.error('修改参数失败')
      }
      this.$message.success('修改参数成功')
      this.editForm = res.data.data
      this.editDialogVisible = true
    }
  },
  computed: {
    // 如果按钮需要被禁用，则返回true，反之返回false
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类ID
    cateId () {
      if (this.selectedCateKeys.length !== 3) {
        return null
      }
      return this.selectedCateKeys.at(-1)
    },
    //  动态计算标题的文本
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style scoped lang="less">
.box {
  margin: 15px 0;
}

.el-tag {
  margin: 5px;
}

.input-new-tag {
  width: 120px;
}

</style>
